After a day optimizing ASTs, Magnolia now gets approximately 12x better compile-time performance for typeclass derivation than Shapeless!
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That's for just one very specific test, repeated 100 times. Total compile time is 50s with Shapeless/Kittens, and 4s with Magnolia. Hot JVM.
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On a cold JVM, I get 16s on Magnolia vs 77s for Kittens/Shapeless. Hotspot seems to be doing wonders here...
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Impressive.
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When your codegen hits the JVM classfile limit for something that *seems* simple, there's probably some wastage... There certainly was here.
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